Messages in this thread | | | Date | Fri, 06 Dec 2013 17:07:12 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [Qemu-devel] [PATCH v2 3/3] X86, mpx: Intel MPX xstate feature definition |
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On 12/06/2013 04:23 PM, Ren, Qiaowei wrote: >>> >>> We need to either disable these features in lazy mode, or we need to >>> force eager mode if these features are to be supported. The problem >>> with the latter is that it means forcing eager mode regardless of if >>> anything actually *uses* these features. >>> >>> A third option would be to require applications to use a prctl() or >>> similar to enable eager-save features. >>> >> >> The third option seems better -- how does native mpx patches work, force >> eager? >> > It should be the second option, as you can see xsave.c which we remove from this patch. :) >
Ah yes... I missed the fact that that chunk had been dropped from this patch. It really shouldn't be.
I'll substitute the previous version of the patch.
-hpa
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